System Sensor M500SAP Installation And Maintenance Instructions page 3

FIGURE 4. TYPICAL FAULT TOLERANT NOTIFICATION APPLIANCE CIRCUIT CONFIGURATION, NFPA CLASS A
24 VDC NAC output —
Listed, regulated,
power-limited per NFPA 70,
reverse polarity, switched
Power and NAC polarities are shown in alarm.
47K EOL resistor
is internal at
Terminals
T8 & T9
NOTE 1: Any fault on Terminals T7 and T8 is limited to that zone and does not result in a fault on another zone
when multiple control modules are interconnected.
NOTE 2: For multiple control modules to serve more than one notification zone, 24 VDC reverse polarity NAC
output wiring to T10 & T11 must be within 20ft in conduit, and wiring of T10 and T11 between control modules must
be mechanically protected.
NOTE 3: EOLR-1 is required on T6&T7 if host FACP/power supply does not support supervision of control module.
FIGURE 5 TYPICAL NAC WIRING TO MDL3 SERIES SYNC MODULE, NFPA 72 CLASS B/CLASS A
24 VDC NAC output —
Listed, regulated,
power-limited per NFPA 70,
reverse polarity, switched
Power and NAC polarities are
shown in alarm.
Class A return: See Note 3
) ( –
Class B ELR-47K
See Note 3
) ( +
EOLR-1
(shown
energized)
NOTE 1: Any fault on Terminals T7 and T8 is limited to that zone and does not result in a fault on another zone when multiple
control modules are interconnected.
NOTE 2: For multiple control modules to serve more than one notification zone, 24 VDC reverse polarity NAC output wiring to
T10 & T11 must be within 20ft in conduit, and wiring of T10 and T11 between control modules must be mechanically protected.
NOTE 3: CLASS B: Install a 47k EOL resistor and do not loop wires back to T8/T9.
CLASS A: Do not install EOL-47K; resistor is internal at Terminals T8 & T9.
NOTE 4: MDL3 not required if FACP NAC is listed to produce the System Sensor Synchronization Protocol
24 VDC CIRCUIT
Do not loop wire on Terminals 10 & 11.
Break wire run to provide supervision of connections.
) ( –
) ( +
) ( – ) ( –
) ( + ) ( +
To next control module or to end-of-line
resistor. See panel manual for resistor values.
REMOVE J1 IN THIS CONFIGURATION.
24 VDC CIRCUIT
Do not loop wire on Terminals 10 & 11.
Break wire run to provide supervision of connections.
MDL3 Series
Sync Module
See Note 4
) ( + ) ( –
) ( –
) ( +
To next control module or to end-of-line relay or
end-of-line resistor. One relay required for
each circuit. NOTE: Some control panels have
built-in supervision and do not require EOLR-1;
refer to panel documentation.
CONTROL
MODULE
) ( –
) ( +
All wiring shown is supervised and power limited.
CONTROL
MODULE
) ( –
) ( +
All wiring shown is supervised and power limited.
3
Connect modules to listed
compatible control panels only.
) ( –
From panel
) ( +
or previous
device
Signaling Line Circuit (SLC)
32 VDC max
Twisted-pair wire is
recommended.
(–)
To next
(+)
device
Connect modules to listed
compatible control panels only.
) ( –
) ( +
Signaling Line Circuit (SLC)
32 VDC max
Twisted-pair wire is
recommended.
(–)
To next
(+)
device
C1018-01
From panel
or previous
device
C2242-04
I56-6790-001
4/17/2023